EP3169902B1 - Compresseur a vis - Google Patents

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Publication number
EP3169902B1
EP3169902B1 EP15736789.7A EP15736789A EP3169902B1 EP 3169902 B1 EP3169902 B1 EP 3169902B1 EP 15736789 A EP15736789 A EP 15736789A EP 3169902 B1 EP3169902 B1 EP 3169902B1
Authority
EP
European Patent Office
Prior art keywords
valve
compressor
gas
screw compressor
duct
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15736789.7A
Other languages
German (de)
English (en)
Other versions
EP3169902A1 (fr
Inventor
Ole Dr. Fredrich
Ottomar Neuwirth
Stefan Losch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEA Refrigeration Germany GmbH
Original Assignee
GEA Refrigeration Germany GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GEA Refrigeration Germany GmbH filed Critical GEA Refrigeration Germany GmbH
Publication of EP3169902A1 publication Critical patent/EP3169902A1/fr
Application granted granted Critical
Publication of EP3169902B1 publication Critical patent/EP3169902B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the present invention relates to a screw compressor according to the preamble of patent claim 1.
  • check valves are usually arranged on the suction side of the compressor, to prevent that when switching off the compressor drive by the pressure difference before and after the compressor comes to a reverse rotation of the compressor, which could damage this.
  • Such check valves also serve to ensure that the pressures of the system before and after the compressor do not compensate when the compressor is stopped.
  • Such systems typically have filters on the suction side of the compressors to prevent dirt from entering and damaging the compressor.
  • the publication DE3210790 A1 describes a pressure-actuated controllable shut-off valve, which can operate in addition to the controlled shut-off function as a check valve.
  • the check valves commonly used in small compressors, which are actuated by a compression spring, are not advantageous because of their large flow losses.
  • the streamlined, operated by compressed gas check valves, which are common in systems with larger compressors, are expensive.
  • the separately arranged components require a plurality of housings, which are connected by connecting elements, which leads to high expenditure on machining and assembly. Pipelines are required to direct gas from the pressure side of the compressor to the check valve, which in practice often cause gas leaks.
  • the object underlying the invention is achieved by a screw compressor with the features of claim 1.
  • the non-return valve located in the compressor housing together with the suction gas filter for its control supplied with compressed gas, wherein the compressed gas passes through drilled or cast in the compressor housing channels to the check valve.
  • a likewise arranged on the compressor solenoid valve is present, which serves for switching on and off the compressed gas supply.
  • the suction gas filter is coaxially arranged around the check valve, that the valve disc of the check valve moves within the Sauggasfilters.
  • a cover of the compressor housing is at the same time end cap of the check valve, in which the valve rod is guided and allows the replacement of the filter.
  • This integrated solution is less expensive than using separate components in the system. By eliminating external lines assembly costs are saved and the risk of gas leakage through broken pipes or leaking pipe fittings is avoided.
  • the check valve controlled by compressed gas has lower flow losses than the check valves commonly used in small and medium screw compressors and actuated by a compression spring.
  • a suction gas filter 2 is arranged in a compressor housing 1 of a screw compressor, which has the shape of a cylinder open on both sides.
  • the compressor housing 1 is closed by a cover 3, so that a change, or the cleaning of the suction gas filter 2 is easily possible.
  • the lid 3 is sealed by a first seal 4, for example, an O-ring to the housing 1.
  • a first seal 4 for example, an O-ring to the housing 1.
  • At both ends of the suction gas filter 2 is fitted in the housing 1, so that the gas entering the compressor is forced to flow through a screen fabric 5, which has the suction gas filter 2, and not laterally past this.
  • valve plate 6 of a check valve 7 is arranged on a valve rod 8.
  • the valve rod 8 is guided by a linear ball bearing 9, so that the valve disc 6 and valve rod 8 are jointly axially displaceable.
  • the linear ball bearing 9 is arranged in a first channel 13 in the lid 3.
  • the linear movement of the valve disk 6 is limited on the one hand by the stop against the cover 3, in the other direction of movement moves the valve disk 6 against a valve seat 10 which is arranged in a bore in the compressor housing 1, which is also arranged coaxially with the valve disk 6 and the suction gas filter 2.
  • the valve seat 10 is sealed against the compressor housing 1 by a second seal 11, for example an O-ring.
  • the check valve 7 As shown in Fig 2, opened.
  • the arrows show the flow of the gas sucked in by the screw compressor. This flows through a suction line 18 axially into a first gas space 19 between valve seat 10 and suction gas filter 2 and is deflected by the valve plate 6 radially outward and flows through the screen mesh 5 of the suction gas filter 2 into a second gas space 12 which between the suction gas filter 2 and a screw rotor 14 of the compressor is formed.
  • a plurality of channels and a solenoid valve 17 is arranged in the compressor housing 1 and in the lid 3 .
  • a second channel 16 extends to the solenoid valve 17, which is arranged directly on the compressor housing 1.
  • the solenoid valve 17 opens so that the check valve 7 closes.
  • the solenoid valve 17 is open, the compressed gas from the gas chamber 15 passes through the channels 16, 22, 23 and 24 through the compressor housing 1 in the lid 3 and there in the first channel 13.
  • the valve rod 8 In the first channel 13 is the valve rod 8.
  • the compressed gas pushes the valve rod 8 with the valve plate 6 to the Valve seat 10.
  • the valve is closed. This pressure equalization between the gas (compressed gas or by the screw rotor 14 compressed gas) in the suction line 18 and the gas in the third gas space 15 is prevented.
  • the screw rotor 14 After start of the screw compressor, the screw rotor 14 generates in the first and second gas chambers 12 and 19 between the valve seat 10 and the screw rotor 14, a negative pressure which is lower than the pressure in the suction line 18, so that the check valve 7 opens and the in Fig.2 shown position occupies. As long as the compressor is not started, the check valve 7 remains closed by the pressure difference between the first gas chamber 19 and the suction line 18. Since it may be necessary for maintenance work to establish a pressure equalization between the first gas space 19 and the suction line 18, in a second possible embodiment of the system according to the invention is a system of bores and a shut-off valve as in Fig.5 shown, provided.
  • a sixth channel 20 in the compressor housing 1 is connected by two channels (seventh channel 21 and eighth channel 29) to the second gas chamber 12 and the suction line 18.
  • a shut-off valve 25 is arranged in the compressor housing 1 so that when closing the shut-off valve 25, the connection of the sixth channel 20 to seventh channel 21 is disconnected or closed.
  • the shut-off valve 25 can be opened, so that the connection of the sixth channel 20 to seventh channel 21 is opened, and thus the pressure between the gas space 19 second gas space 12 and the suction line 18 can compensate.
  • a position reporting system is mounted on the cover 3 of the check valve 7, by means of which an adjustment path of the valve rod 8 can be detected.
  • the detection can in individual embodiments, for example, on mechanical, electrical or electro-magnetic, and on magnetic basis.
  • a corresponding encoder can be provided which outputs or transmits the adjustment path or a signal indicating the adjustment path or representative signal, for example a corresponding voltage signal, to a control device, in particular a control device of the compressor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (10)

  1. Compresseur à vis, destiné en particulier à des systèmes de réfrigération, lequel comporte un boîtier de compresseur (1) qui loge au moins partiellement le compresseur, le compresseur à vis comprenant un filtre à gaz d'aspiration (2) intégré optionnel et une vanne anti-retour intégrée (7),
    caractérisé en ce que
    la vanne anti-retour (7) est une vanne à actionner avec du gaz sous pression et le boîtier de compresseur (1) possède des évidements, notamment des conduits percés ou moulés (13, 16, 22, 23, 24) qui peuvent être alimentés en gaz sous pression pour commander la vanne anti-retour (7).
  2. Compresseur à vis selon la revendication 1,
    caractérisé en ce que
    le compresseur à vis comporte en outre une vanne (17) réalisée de préférence sous la forme d'une vanne magnétique et destinée à connecter ou déconnecter l'alimentation de la vanne anti-retour (7) en gaz sous pression, la vanne magnétique (17) étant disposée directement sur le boîtier de compresseur (1) et établissant la liaison des conduits percés ou moulés (13, 16, 22, 23, 24) dans le boîtier de compresseur (1) .
  3. Compresseur à vis selon la revendication 1 ou la revendication 2,
    caractérisé en ce que
    la vanne anti-retour (7) comporte une tête de vanne (6) et le filtre à gaz d'aspiration (2) est disposé coaxialement à la vanne anti-retour (7) de sorte que la tête de vanne (6) de la vanne anti-retour (7) se déplace à l'intérieur du filtre à gaz d'aspiration (2).
  4. Compresseur à vis selon l'une des revendications précédentes,
    caractérisé en ce que
    le boîtier de compresseur (1) comporte un couvercle (3) et en ce que le couvercle (3) du boîtier de compresseur (1) est en même temps le couvercle du boîtier anti-retour (7).
  5. Compresseur à vis selon l'une des revendications précédentes,
    caractérisé en ce que
    le compresseur à vis comporte une troisième chambre à gaz (15), qui est destinée à recevoir du gaz comprimé, c'est-à-dire du gaz sous pression, et un premier conduit (13) dans lequel la vanne anti-retour (7) est logée au moins partiellement, la troisième chambre à gaz (15) et le premier conduit (13) étant en communication au moyen d'une liaison fluidique.
  6. Compresseur à vis selon l'une des revendications 2 à 5,
    caractérisé en ce que
    le compresseur à vis comprend une troisième chambre à gaz (15) qui est destinée à recevoir du gaz comprimé, c'est-à-dire du gaz sous pression, et un/le premier conduit (13) dans lequel la vanne anti-retour (7) est logée au moins partiellement, le boîtier de compresseur (1) comportant un deuxième conduit (16) qui débouche à une première extrémité dans la troisième chambre de gaz (15) et à une deuxième extrémité dans un premier raccord d'une/de la vanne magnétique (17), et le boîtier de compresseur (1) comportant d'autres conduits, en particulier un troisième conduit (22), un quatrième conduit (23) et un cinquième conduit (24) qui communiquent entre eux, l'un des conduits (22 à 24) débouchant à l'une de ses extrémités dans un premier raccord d'une/de la vanne magnétique (17) et un autre des conduits (22 à 24) débouchant dans un premier conduit (13).
  7. Compresseur à vis selon l'une des revendications précédentes,
    caractérisé en ce que
    le compresseur à vis comporte un volume d'aspiration, en particulier une conduite d'aspiration (18) et une première chambre à gaz (19), qui est situé à l'intérieur du filtre à gaz d'aspiration (2), la première chambre à gaz (19) et le volume d'aspiration étant en communication au moyen d'une liaison fluidique.
  8. Compresseur à vis selon l'une des revendications précédentes,
    caractérisé en ce que
    le compresseur à vis comporte un/le volume d'aspiration, en particulier une/la conduite d'aspiration (18) et une/la première chambre à gaz (19) qui est disposée à l'intérieur du filtre à gaz d'aspiration (2), et en ce que le boîtier de compresseur (1) comporte des conduits, en particulier un sixième conduit (20), un septième conduit (21) et un huitième conduit (29) qui communiquent entre eux, l'un des condits (20, 21, 29) débouchant dans la conduite d'aspiration (18) s'ouvre et un autre des conduits (20, 21, 29) débouchant dans la deuxième chambre à gaz (12).
  9. Compresseur à vis selon l'une des revendications précédentes,
    caractérisé en ce que
    la vanne anti-retour (7) comporte une tige de vanne (8) qui est guidée au moyen d'un roulement à billes linéaire (9), en particulier dans un premier conduit (13) du boîtier de compresseur (1)
  10. Compresseur à vis selon l'une des revendications 4 à 9,
    caractérisé en ce que
    un système de signalisation de position, destiné à détecter le trajet de réglage de la tige de vanne (8), est disposé au niveau du couvercle (3) de la vanne anti-retour (7).
EP15736789.7A 2014-07-19 2015-07-10 Compresseur a vis Active EP3169902B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014010534.2A DE102014010534A1 (de) 2014-07-19 2014-07-19 Schraubenverdichter
PCT/EP2015/001413 WO2016012083A1 (fr) 2014-07-19 2015-07-10 Compresseur à vis

Publications (2)

Publication Number Publication Date
EP3169902A1 EP3169902A1 (fr) 2017-05-24
EP3169902B1 true EP3169902B1 (fr) 2018-09-19

Family

ID=53546200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15736789.7A Active EP3169902B1 (fr) 2014-07-19 2015-07-10 Compresseur a vis

Country Status (6)

Country Link
US (1) US10648473B2 (fr)
EP (1) EP3169902B1 (fr)
CN (1) CN107076151B (fr)
DE (1) DE102014010534A1 (fr)
DK (1) DK3169902T3 (fr)
WO (1) WO2016012083A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640644A (zh) * 2016-12-01 2017-05-10 南京德西联智能科技有限公司 可实现辅助进气的预冷压缩机
US11313370B2 (en) * 2017-12-08 2022-04-26 Hitachi Industrial Equipment Systems Co., Ltd. Liquid-injected screw compressor
CN114688021A (zh) * 2020-12-25 2022-07-01 宁波市润桥工业设计有限公司 一种充排可控的螺杆泵

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Also Published As

Publication number Publication date
WO2016012083A1 (fr) 2016-01-28
US10648473B2 (en) 2020-05-12
CN107076151A (zh) 2017-08-18
CN107076151B (zh) 2020-07-24
DE102014010534A1 (de) 2016-01-21
US20170211575A1 (en) 2017-07-27
EP3169902A1 (fr) 2017-05-24
DK3169902T3 (en) 2019-01-14

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